Sigismund.

MLA

Thomas, Edward A. “Sigismund.” Comprehensive Dictionary of Biography, Jan. 1883, p. 492. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edb&AN=60634680&authtype=sso&custid=ns315887.

APA

Thomas, E. A. (1883). Sigismund. Comprehensive Dictionary of Biography, 492.

Chicago

Thomas, Edward A. 1883. “Sigismund.” Comprehensive Dictionary of Biography, January, 492. http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edb&AN=60634680&authtype=sso&custid=ns315887.